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<!-- DFIN New ActiveDisclosure (SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ --> |
<!-- Creation Date :2022-08-03T09:16:10.2127+00:00 --> |
<!-- Copyright (c) 2022 Donnelly Financial Solutions, Inc. All Rights Reserved. --> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="us-gaap_LongTermDebtNoncurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="us-gaap_RetirementPlanTypeAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent" xlink:label="us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Dividends" xlink:label="us-gaap_Dividends"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementAxis" xlink:label="srt_RestatementAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCash" xlink:label="us-gaap_RestrictedCash"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="us-gaap_CostOfGoodsAndServicesSold"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="us-gaap_PensionPlansDefinedBenefitMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="us-gaap_RevolvingCreditFacilityMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_TreasuryStockValueAcquired" xlink:label="tmst_TreasuryStockValueAcquired"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="us-gaap_InvestmentIncomeInterest"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleNotesPayableCurrent" xlink:label="us-gaap_ConvertibleNotesPayableCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReorganizationValueNetRealizableValueOfAssetDispositions" xlink:label="us-gaap_ReorganizationValueNetRealizableValueOfAssetDispositions"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RevisionOfPriorPeriodAccountingStandardsUpdateAdjustmentMember" xlink:label="srt_RevisionOfPriorPeriodAccountingStandardsUpdateAdjustmentMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_SupplementalPensionPlanOfTimkensteelCorporationMember" xlink:label="tmst_SupplementalPensionPlanOfTimkensteelCorporationMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="us-gaap_DisposalGroupClassificationAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense" xlink:label="us-gaap_IncreaseDecreaseInPrepaidExpense"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember" xlink:label="srt_RangeMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LossContingencyAccrualAtCarryingValue" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_DefinedBenefitPlanExpectedAnnuityPurchaseYear" xlink:label="tmst_DefinedBenefitPlanExpectedAnnuityPurchaseYear"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityMethodInvestmentAggregateCost" xlink:label="us-gaap_EquityMethodInvestmentAggregateCost"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_DefinedBenefitPlanTerminatedEffectiveDate" xlink:label="tmst_DefinedBenefitPlanTerminatedEffectiveDate"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="us-gaap_ProceedsFromStockOptionsExercised"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LossContingencyAccrualDisclosuresAbstract" xlink:label="us-gaap_LossContingencyAccrualDisclosuresAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="us-gaap_LongtermDebtTypeAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:label="us-gaap_DeferredIncomeTaxLiabilitiesNet"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerTextBlock" xlink:label="us-gaap_RevenueFromContractWithCustomerTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchasedWithPotentialProceeds" xlink:label="tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchasedWithPotentialProceeds"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ImpairedLongLivedAssetsHeldAndUsedAssetNameDomain" xlink:label="us-gaap_ImpairedLongLivedAssetsHeldAndUsedAssetNameDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_MexicoPensionPlanMember" xlink:label="tmst_MexicoPensionPlanMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtFairValueDisclosures" xlink:label="us-gaap_ConvertibleDebtFairValueDisclosures"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtTableTextBlock" xlink:label="us-gaap_ConvertibleDebtTableTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="us-gaap_RetirementPlanSponsorLocationDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_DecreaseInLiabilityDueToReversalOfCostRemeasurement" xlink:label="tmst_DecreaseInLiabilityDueToReversalOfCostRemeasurement"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GainLossOnDispositionOfAssets1" xlink:label="us-gaap_GainLossOnDispositionOfAssets1"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostExcludingServiceComponent" xlink:label="tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostExcludingServiceComponent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_DefinedBenefitPlanBenefitReceivingPaymentsByPlanParticipant" xlink:label="tmst_DefinedBenefitPlanBenefitReceivingPaymentsByPlanParticipant"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestPaidCapitalized" xlink:label="us-gaap_InterestPaidCapitalized"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_CashProceedsFromIssuanceOfRemainingInternalRevenueService" xlink:label="tmst_CashProceedsFromIssuanceOfRemainingInternalRevenueService"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="us-gaap_PreferredStockSharesIssued"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_EmployeeRetentionCreditRefundableTaxCreditForEligibleEmployer" xlink:label="tmst_EmployeeRetentionCreditRefundableTaxCreditForEligibleEmployer"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_DaidoSteelShanghaiCoLimitedMember" xlink:label="tmst_DaidoSteelShanghaiCoLimitedMember"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_ForeignTaxPayments" xlink:label="tmst_ForeignTaxPayments"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_SalesAndUseTaxRefund" xlink:label="tmst_SalesAndUseTaxRefund"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsForCapitalImprovements" xlink:label="us-gaap_PaymentsForCapitalImprovements"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_PercentageOfEmployeeWagesDeferredAsEmployerShareOfPayrollTaxes" xlink:label="tmst_PercentageOfEmployeeWagesDeferredAsEmployerShareOfPayrollTaxes"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_TimkensteelCorporationRetirementPlanMember" xlink:label="tmst_TimkensteelCorporationRetirementPlanMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInPensionPlanObligations" xlink:label="us-gaap_IncreaseDecreaseInPensionPlanObligations"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SeveranceCosts1" xlink:label="us-gaap_SeveranceCosts1"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MoneyMarketFundsAtCarryingValue" xlink:label="us-gaap_MoneyMarketFundsAtCarryingValue"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateEarlyAdoption" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateEarlyAdoption"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_ThirdAmendedCreditFacilityMember" xlink:label="tmst_ThirdAmendedCreditFacilityMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward" xlink:label="us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetImpairmentCharges" xlink:label="us-gaap_AssetImpairmentCharges"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="us-gaap_InventoryDisclosureTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_SpecialBarQualityBarsMember" xlink:label="tmst_SpecialBarQualityBarsMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsAbstract" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_SparePartsMember" xlink:label="tmst_SparePartsMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresAbstract" xlink:label="us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain" xlink:label="srt_CumulativeEffectPeriodOfAdoptionDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryValuationReserves" xlink:label="us-gaap_InventoryValuationReserves"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="us-gaap_TypeOfAdoptionMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredFinanceCostsGross" xlink:label="us-gaap_DeferredFinanceCostsGross"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="us-gaap_DisaggregationOfRevenueTable"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtMember" xlink:label="us-gaap_ConvertibleDebtMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributions" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitContributions"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="us-gaap_DefinedBenefitPlanInterestCost"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessExitCosts1" xlink:label="us-gaap_BusinessExitCosts1"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="us-gaap_RetirementPlanTypeDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems" xlink:label="us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_TimkensteelUKPensionSchemeMember" xlink:label="tmst_TimkensteelUKPensionSchemeMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RepaymentsOfConvertibleDebt" xlink:label="us-gaap_RepaymentsOfConvertibleDebt"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="us-gaap_DefinedBenefitPlanServiceCost"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal" xlink:label="us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_MeltAndCastRelatedAssetsMember" xlink:label="tmst_MeltAndCastRelatedAssetsMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentTransitionReport" xlink:label="dei_DocumentTransitionReport"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="us-gaap_DepreciationDepletionAndAmortization"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_IndustrialMarketSectorMember" xlink:label="tmst_IndustrialMarketSectorMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:label="us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInDeferredIncomeTaxes" xlink:label="us-gaap_IncreaseDecreaseInDeferredIncomeTaxes"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="us-gaap_AccountsReceivableNetCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedIssued" xlink:label="tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedIssued"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_NumberOfProvisionsWithinActThatImpactsCompany" xlink:label="tmst_NumberOfProvisionsWithinActThatImpactsCompany"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="us-gaap_AmortizationOfFinancingCosts"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_DeferredCashPaymentsOfPayrollTaxes" xlink:label="tmst_DeferredCashPaymentsOfPayrollTaxes"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RestatementDomain" xlink:label="srt_RestatementDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdTradingDays"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement" xlink:label="tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="us-gaap_AdditionalPaidInCapitalMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="us-gaap_RestructuringReserveRollForward"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased" xlink:label="us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="us-gaap_EarningsPerShareTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable" xlink:label="us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressStateOrProvince" xlink:label="dei_EntityAddressStateOrProvince"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_DefinedBenefitPlanTermOfContract" xlink:label="tmst_DefinedBenefitPlanTermOfContract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued" xlink:label="us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_US" xlink:label="country_US"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityShellCompany" xlink:label="dei_EntityShellCompany"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_ProceedsFromIssuanceOfInternalRevenueService" xlink:label="tmst_ProceedsFromIssuanceOfInternalRevenueService"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="us-gaap_IncreaseDecreaseInInventories"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_NumberOfInstallmentsDeferredCashPaymentsOfPayrollTaxesToBePaid" xlink:label="tmst_NumberOfInstallmentsDeferredCashPaymentsOfPayrollTaxesToBePaid"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherInventorySupplies" xlink:label="us-gaap_OtherInventorySupplies"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_EnergyMarketSectorMember" xlink:label="tmst_EnergyMarketSectorMember"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_TreasuryStockShareAcquired" xlink:label="tmst_TreasuryStockShareAcquired"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="us-gaap_RevenueFromContractWithCustomerAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_OtherComprehensiveIncomeLossDeferralsBeforeTax" xlink:label="tmst_OtherComprehensiveIncomeLossDeferralsBeforeTax"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1" xlink:label="us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryWorkInProcess" xlink:label="us-gaap_InventoryWorkInProcess"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="us-gaap_DebtDisclosureTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestPaid" xlink:label="us-gaap_InterestPaid"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_QualifiedWagesPerEmployee" xlink:label="tmst_QualifiedWagesPerEmployee"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockMember" xlink:label="us-gaap_TreasuryStockMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CounterpartyNameAxis" xlink:label="srt_CounterpartyNameAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_OtherMarketSectorMember" xlink:label="tmst_OtherMarketSectorMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanNameDomain" xlink:label="us-gaap_RetirementPlanNameDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="us-gaap_OtherNonoperatingIncomeExpense"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestExpenseAbstract" xlink:label="us-gaap_InterestExpenseAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtCurrent" xlink:label="us-gaap_LongTermDebtCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract" xlink:label="us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatutoryAccountingPracticesByJurisdictionAxis" xlink:label="us-gaap_StatutoryAccountingPracticesByJurisdictionAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_USFederalPayments" xlink:label="tmst_USFederalPayments"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="us-gaap_OtherIncomeAndExpensesAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsForRestructuring" xlink:label="us-gaap_PaymentsForRestructuring"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestOnConvertibleDebtNetOfTax" xlink:label="us-gaap_InterestOnConvertibleDebtNetOfTax"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MajorCustomersAxis" xlink:label="srt_MajorCustomersAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="us-gaap_DisaggregationOfRevenueLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_ManufacturedComponentsMember" xlink:label="tmst_ManufacturedComponentsMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestExpenseDebtExcludingAmortization" xlink:label="us-gaap_InterestExpenseDebtExcludingAmortization"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_InvestmentLossesOnPlanAssets" xlink:label="tmst_InvestmentLossesOnPlanAssets"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_DefinedBenefitPlanContractExpirationDate" xlink:label="tmst_DefinedBenefitPlanContractExpirationDate"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="us-gaap_DeferredFinanceCostsNet"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioForecastMember" xlink:label="srt_ScenarioForecastMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsMember" xlink:label="us-gaap_RetainedEarningsMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanBenefitObligationPaymentForSettlement" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligationPaymentForSettlement"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_SalariesWagesAndBenefitsCurrent" xlink:label="tmst_SalariesWagesAndBenefitsCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries" xlink:label="us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NameOfMajorCustomerDomain" xlink:label="srt_NameOfMajorCustomerDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent" xlink:label="us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityInteractiveDataCurrent" xlink:label="dei_EntityInteractiveDataCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_MobileMarketSectorMember" xlink:label="tmst_MobileMarketSectorMember"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_SeamlessMechanicalTubingMember" xlink:label="tmst_SeamlessMechanicalTubingMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherNonoperatingIncomeAndExpenseTextBlock" xlink:label="us-gaap_OtherNonoperatingIncomeAndExpenseTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="srt_ConsolidatedEntitiesAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="us-gaap_InventoryDisclosureAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ImpairmentChargeOnReclassifiedAssets" xlink:label="us-gaap_ImpairmentChargeOnReclassifiedAssets"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharePrice" xlink:label="us-gaap_SharePrice"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_IncreaseDecreaseInCurrentConvertibleNotesNet" xlink:label="tmst_IncreaseDecreaseInCurrentConvertibleNotesNet"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareBasic" xlink:label="us-gaap_EarningsPerShareBasic"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_GainLossOnSaleOfConsolidatedSubsidiary" xlink:label="tmst_GainLossOnSaleOfConsolidatedSubsidiary"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GrossProfit" xlink:label="us-gaap_GrossProfit"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockValue" xlink:label="us-gaap_TreasuryStockValue"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockCompensationPlanMember" xlink:label="us-gaap_StockCompensationPlanMember"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_AmericanRescuePlanActMember" xlink:label="tmst_AmericanRescuePlanActMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedEmployeeBenefitsCurrent" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryGross" xlink:label="us-gaap_InventoryGross"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_TimkensteelCorporationBargainingUnitPensionPlanMember" xlink:label="tmst_TimkensteelCorporationBargainingUnitPensionPlanMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsPayableTradeCurrent" xlink:label="us-gaap_AccountsPayableTradeCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_ActProvisionsDescription" xlink:label="tmst_ActProvisionsDescription"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_MX" xlink:label="country_MX"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_StockIssuedDuringPeriodSharesStockBasedCompensation" xlink:label="tmst_StockIssuedDuringPeriodSharesStockBasedCompensation"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_MiscellaneousNonoperatingIncomeExpense" xlink:label="tmst_MiscellaneousNonoperatingIncomeExpense"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CoverAbstract" xlink:label="dei_CoverAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanSponsorLocationAxis" xlink:label="us-gaap_RetirementPlanSponsorLocationAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain" xlink:label="srt_ProductsAndServicesDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryFinishedGoods" xlink:label="us-gaap_InventoryFinishedGoods"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermLineOfCredit" xlink:label="us-gaap_LongTermLineOfCredit"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignPlanMember" xlink:label="us-gaap_ForeignPlanMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchased" xlink:label="tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchased"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_PercentageOfTaxCredits" xlink:label="tmst_PercentageOfTaxCredits"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanNameAxis" xlink:label="us-gaap_RetirementPlanNameAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued" xlink:label="us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_AdditionalInventoryReserve" xlink:label="tmst_AdditionalInventoryReserve"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:label="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="us-gaap_DebtInstrumentCarryingAmount"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:label="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_ConvertibleSeniorNotesdueTwentyTwentyOneMember" xlink:label="tmst_ConvertibleSeniorNotesdueTwentyTwentyOneMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PerformanceSharesMember" xlink:label="us-gaap_PerformanceSharesMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DomesticPlanMember" xlink:label="us-gaap_DomesticPlanMember"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockSharesAcquired" xlink:label="us-gaap_TreasuryStockSharesAcquired"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="tmst-20220630.xsd#tmst_IncreaseDecreaseToAdditionalPaidInCapital" xlink:label="tmst_IncreaseDecreaseToAdditionalPaidInCapital"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount1"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_GB" xlink:label="country_GB"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="us-gaap_LongtermDebtTypeDomain"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:label="us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, City or Town </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address, City or Town </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Repurchased During Period, Value </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock Repurchased, Amount </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairedLongLivedAssetsHeldAndUsedByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Impaired Long-Lived Assets Held and Used by Type </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairedLongLivedAssetsHeldAndUsedByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Impaired Long-Lived Assets Held and Used by Type [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net Income (Loss) Available to Common Stockholders, Basic, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net income (loss), basic </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Net Income (Loss) Available to Common Stockholders, Basic </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> New Accounting Pronouncements Or Change In Accounting Principle [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Standards Update and Change in Accounting Principle [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Per Share Data: </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Earnings Per Share [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Disposal Group, Held-for-sale, Not Discontinued Operation </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disposal Group, Held-for-sale, Not Discontinued Operations [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Financing Activities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided by (Used in) Financing Activities [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Other, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase (Decrease) in Other Operating Assets and Liabilities, Net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Long-term Line of Credit, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Outstanding borrowings </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Long-Term Line of Credit </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Amendment Flag </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Amendment Flag </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Pension and postretirement liability adjustments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Subsequent Event Type [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Operating lease right-of-use assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease, Right-of-Use Asset </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Disposal Group Name </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disposal Group Name [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Quarterly Report </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Document Quarterly Report </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt Instrument [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Long-Term Debt Instruments [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Convertible notes settlement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Payments for Repurchase of Common Stock </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Purchase of treasury shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Purchase of treasury shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedTranslationAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Foreign Currency Translation Adjustments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedTranslationAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accumulated Foreign Currency Adjustment Attributable to Parent [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_HarrisonFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Harrison Facility </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_HarrisonFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Harrison Facility [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_HarrisonFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Harrison facility. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statement [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Statement [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Non-current operating lease liabilities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease, Liability, Noncurrent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Change in accounting principle, accounting standards update, immaterial effect </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkenSteelShanghaiCorporationLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> TimkenSteel (Shanghai) Corporation Limited </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkenSteelShanghaiCorporationLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Timken Steel Shanghai Corporation Limited [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkenSteelShanghaiCorporationLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> TimkenSteel (Shanghai) Corporation Limited. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Postretirement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Postretirement Benefits Plan [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated Other Comprehensive Income Loss [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accumulated Other Comprehensive Income (Loss) [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MachineryAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Machinery and Equipment </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MachineryAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Machinery and Equipment [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Restructuring Charges, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Expenses </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restructuring charges </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring Charges </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt Instrument, threshold Percentage of stock price conversion </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockReissuedAtLowerThanRepurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Treasury Stock Reissued at Lower than Repurchase Price </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockReissuedAtLowerThanRepurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Average Repurchase price </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate201912Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> ASU 2019-12 </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate201912Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Standards Update 2019-12 [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Product and Service </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Product and Service [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Underwater Options [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Stock [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncreaseDecreaseInNonCurrentConvertibleNotesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Increase to non-current convertible notes net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncreaseDecreaseInNonCurrentConvertibleNotesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Non Current Convertible Notes Net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncreaseDecreaseInNonCurrentConvertibleNotesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Increase (decrease) in non-current convertible notes, net. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cumulative Effect, Period of Adoption, Adjustment </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Cumulative Effect, Period of Adoption, Adjustment [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupClassificationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Disposal Group Classification </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupClassificationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disposal Group Classification [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total Liabilities and Shareholders’ Equity </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities and Equity </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Pension assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Assets for Plan Benefits, Defined Benefit Plan </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ContractLiabalitiesTotalated_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Contract liabilities totalated </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ContractLiabalitiesTotalated_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Contract liabalities totalated </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ContractLiabalitiesTotalated_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Contract liabalities totalated. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Denominator: </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Weighted Average Number of Shares Outstanding, Diluted [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_FutureAllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Future stock-based compensation expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_FutureAllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Future Allocated Share Based Compensation Expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_FutureAllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Future allocated share based compensation expense. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryRawMaterials_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Inventory, Raw Materials, Gross, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryRawMaterials_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Raw materials </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryRawMaterials_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Inventory, Raw Materials, Gross </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Change in accounting principle, accounting standards update, adopted </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Change in Accounting Principle, Accounting Standards Update, Adopted [true false] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatutoryAccountingPracticesJurisdictionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statutory Accounting Practices, Jurisdiction </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatutoryAccountingPracticesJurisdictionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Statutory Accounting Practices, Jurisdiction [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Incorporation, State or Country Code </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Incorporation, State or Country Code </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Income Statement [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ConvertibleNotesRepurchasedOutstandingPrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Convertible notes repurchased outstanding principal amount </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ConvertibleNotesRepurchasedOutstandingPrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Notes Repurchased Outstanding Principal Amount </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ConvertibleNotesRepurchasedOutstandingPrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Convertible notes repurchased outstanding principal amount. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncashExcludingMarkToMarketAdjustments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Pension and postretirement (benefit) expense, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncashExcludingMarkToMarketAdjustments_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash Excluding Mark To Market Adjustments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncashExcludingMarkToMarketAdjustments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Pension and Other Postretirement Benefits Expense (Reversal of Expense), Noncash, Excluding Mark-to-Market Adjustments. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total Current Liabilities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Interest expense, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Interest expense, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Interest Expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Accounts Receivable, Allowance for Credit Loss, Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Accounts Receivable, Allowance for Credit Loss, Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Allowances for accounts receivable </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accounts Receivable, Allowance for Credit Loss </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Preferred shares, authorized (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Preferred Stock, Shares Authorized </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accrued pension and postretirement costs </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Liability, Defined Benefit Plan, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Treasury Stock, Shares, Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Treasury Stock, Shares, Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Treasury Stock, Shares, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Treasury shares (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Treasury Stock, Shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cumulative Effect, Period of Adoption </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Cumulative Effect, Period of Adoption [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of (Benefit) Provision for Income Taxes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DisposalGroupAcceleratedDepreciationAndAmortizationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accelerated depreciation </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DisposalGroupAcceleratedDepreciationAndAmortizationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disposal Group Accelerated Depreciation And Amortization Expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DisposalGroupAcceleratedDepreciationAndAmortizationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Disposal Group, Accelerated Depreciation And Amortization Expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Small Business </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Small Business </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Cash, cash equivalents, and restricted cash at beginning of period </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Cash, Cash Equivalents, and Restricted Cash at End of Period </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total cash, cash equivalents, and restricted cash shown in the Consolidated Statements of Cash Flows </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Total cash, cash equivalents, and restricted cash shown in the Consolidated Statements of Cash Flows </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring and Related Activities [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Restructuring Reserve, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Ending balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring Reserve </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate202006Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Standards Update 2020-06 [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate202006Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounting Standards Update 202006 Member </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total Current Assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Assets, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other comprehensive income (loss) before reclassifications, before income tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> OCI, before Reclassifications, before Tax, Attributable to Parent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Weighted Average Number of Shares Outstanding, Basic, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted average shares outstanding, basic (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Weighted Average Number of Shares Outstanding, Basic </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Unamortized debt issuance costs </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Related Commitment Fees and Debt Issuance Costs </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> City Area Code </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> City Area Code </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Current and Non-current Debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Debt [Table Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Incremental Common Shares Attributable to Conversion of Debt Securities, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Dilutive effect of convertible notes (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Disposition of Non-Core Assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleTermsOfConversionFeature_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Terms of conversion </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleTermsOfConversionFeature_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument, Convertible, Terms of Conversion Feature </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNoteTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated Other Comprehensive Income (Loss) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNoteTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Comprehensive Income (Loss) Note [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Share-Based Payment Arrangement [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Other (Income) Expense, Net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Other Nonoperating Income (Expense) [Table Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total Liabilities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Period End Date </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Document Period End Date </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_LineofCreditFacilityTentativeFutureCommitmentIncrease_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Line of Credit Facility, Tentative Future Commitment Increase </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_LineofCreditFacilityTentativeFutureCommitmentIncrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Lineof Credit Facility Tentative Future Commitment Increase </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_LineofCreditFacilityTentativeFutureCommitmentIncrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Line of credit facility, tentative future commitment increase </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_OtherProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_OtherProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Products [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_OtherProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Other Products [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> New Accounting Pronouncements Or Change In Accounting Principle [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> New Accounting Pronouncements or Change in Accounting Principle [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net Periodic Benefit Cost (Income) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plan, Net Periodic Benefit Cost (Credit) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_FirstInLastOutFILOMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> First In, Last Out (FILO) [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_FirstInLastOutFILOMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> First In Last Out F I L O [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_FirstInLastOutFILOMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> First In, Last Out (FILO) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Settlement through issuance of shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Conversion, Converted Instrument, Shares Issued </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_CoronavirusAidReliefAndEconomicSecurityActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Coronavirus Aid, Relief, and Economic Security Act </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_CoronavirusAidReliefAndEconomicSecurityActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Coronavirus Aid Relief And Economic Security Act [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_CoronavirusAidReliefAndEconomicSecurityActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Coronavirus aid, relief, and economic security act. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statistical Measurement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Statistical Measurement [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other current assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Assets, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ConvertibleSeniorNotesDueTwentyTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Convertible Senior Notes due 2025 </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ConvertibleSeniorNotesDueTwentyTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Senior Notes Due Twenty Twenty Five [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ConvertibleSeniorNotesDueTwentyTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Convertible Senior Notes due Twenty Twenty Five [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Restructuring Reserve </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Restructuring Reserve by Type of Cost [Table Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total Assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Convertible notes settlement (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period, Shares, Conversion of Convertible Securities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Long-term Debt, Excluding Current Maturities, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Total non-current portion of debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Long-Term Debt, Excluding Current Maturities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Earnings Per Share, Diluted, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Diluted earnings (loss) per share </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Earnings Per Share, Diluted </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Diluted earnings (loss) per share </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Retirement Plan Type </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Retirement Plan Type [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Assets Held-for-sale, Not Part of Disposal Group, Current, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Assets held for sale </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Assets Held-for-sale, Not Part of Disposal Group, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Dividends_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Dividends, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Dividends_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Dividend declared and paid </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Dividends_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Dividends </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, Postal Zip Code </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address, Postal Zip Code </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revision of Prior Period </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Revision of Prior Period [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Fiscal Period Focus </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Document Fiscal Period Focus </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Restricted Cash </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Restricted Cash </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Cost of Goods and Services Sold, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cost of products sold </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Cost of Goods and Services Sold </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Accounts receivable, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase (Decrease) in Accounts Receivable </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Pension </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Pension Plan [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Credit Agreement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Revolving Credit Facility [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Preferred Stock, Value, Issued, Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Preferred Stock, Value, Issued, Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Preferred Stock, Value, Issued, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Preferred shares, without par value; authorized 10.0 million shares, none issued </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Preferred Stock, Value, Issued </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock-based compensation expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> APIC, Share-Based Payment Arrangement, Increase for Cost Recognition </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TreasuryStockValueAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Treasury stock value acquired. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TreasuryStockValueAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Treasury Stock, Value, Acquired </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TreasuryStockValueAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Purchase of treasury shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Incremental Common Shares Attributable to Share-based Payment Arrangements, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Dilutive effect of stock-based awards (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Interest income </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Interest income </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Investment Income, Interest </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleNotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Current convertible notes, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleNotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Notes Payable, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Counterparty Name </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Counterparty Name [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net Cash Provided (Used) by Financing Activities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided by (Used in) Financing Activities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Impairment of Long-Lived Assets to be Disposed of </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Impairment charges related to the indefinite idling of assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReorganizationValueNetRealizableValueOfAssetDispositions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Remaining inventory, net realizable value </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReorganizationValueNetRealizableValueOfAssetDispositions_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Reorganization Value, Net Realizable Value of Asset Dispositions </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RevisionOfPriorPeriodAccountingStandardsUpdateAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revision of Prior Period, Accounting Standards Update, Adjustment </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RevisionOfPriorPeriodAccountingStandardsUpdateAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Revision of Prior Period, Accounting Standards Update, Adjustment [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Statement of Financial Position [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SupplementalPensionPlanOfTimkensteelCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Supplemental pension plan of TimkenSteel corporation. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SupplementalPensionPlanOfTimkensteelCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Supplemental Pension Plan Of TimkenSteel Corporation [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SupplementalPensionPlanOfTimkensteelCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Supplemental Plan </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupClassificationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Disposal Group Classification </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupClassificationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disposal Group Classification [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity File Number </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity File Number </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Scenario </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Scenario [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Deferred charges and prepaid expenses </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase (Decrease) in Prepaid Expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Statement of Cash Flows [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Retirement and Postretirement Plans </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Retirement Benefits [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statistical Measurement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Statistical Measurement [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Statement of Stockholders' Equity [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Loss Contingency Accrual, Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Loss Contingency Accrual, Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Contingency reserves </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Loss Contingency Accrual </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Repurchased and Retired During Period, Shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock Repurchased, Shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanExpectedAnnuityPurchaseYear_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Defined benefit plan expected annuity purchase year. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanExpectedAnnuityPurchaseYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plan Expected Annuity Purchase Year </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanExpectedAnnuityPurchaseYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Expected annuity purchase year </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentAggregateCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Equity Method Investment, Aggregate Cost </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentAggregateCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Aggregate cost </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other comprehensive income (loss), net of tax of $0.3 million for the three months ended March 31, 2022 and $0.4 million for the six months ended June 30, 2022 </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanTerminatedEffectiveDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Defined benefit plan terminated effective date. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanTerminatedEffectiveDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plan Terminated Effective Date </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanTerminatedEffectiveDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Expected annuity purchase year </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from exercise of stock options </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds from Stock Options Exercised </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Loss Contingency Accrual, Disclosures [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Long-Term Debt, Type [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeTaxLiabilitiesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Deferred Income Tax Liabilities, Net, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeTaxLiabilitiesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Deferred income taxes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeTaxLiabilitiesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Deferred Income Tax Liabilities, Net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revenue Recognition </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Revenue from Contract with Customer [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Antidilutive Securities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Antidilutive Securities [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchasedWithPotentialProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Shares assumed purchased with potential proceeds </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchasedWithPotentialProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Incremental Common Shares Attributable To Share Based Payment Arrangements Shares Assumed Purchased With Potential Proceeds </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchasedWithPotentialProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Incremental common shares attributable to share based payment arrangements shares assumed purchased with potential proceeds. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairedLongLivedAssetsHeldAndUsedAssetNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Impaired Long-Lived Assets Held and Used, Asset Name </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairedLongLivedAssetsHeldAndUsedAssetNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Impaired Long-Lived Assets Held and Used, Asset Name [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MexicoPensionPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Mexico pension plan. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MexicoPensionPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Mexico Pension Plan [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MexicoPensionPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Pension Plan </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebtFairValueDisclosures_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair value of convertible notes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebtFairValueDisclosures_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Debt, Fair Value Disclosures </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Components of Convertible Notes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Debt [Table Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Credit Facility </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Credit Facility [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Weighted average shares outstanding, diluted (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Weighted Average Number of Shares Outstanding, Diluted </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanSponsorLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Retirement Plan Sponsor Location [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Credit Facility </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Credit Facility [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DecreaseInLiabilityDueToReversalOfCostRemeasurement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Decrease in Liability Due To Reversal Of Cost Remeasurement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DecreaseInLiabilityDueToReversalOfCostRemeasurement_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Decrease in Liability Due To Reversal Of Cost Remeasurement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DecreaseInLiabilityDueToReversalOfCostRemeasurement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Decrease in liability </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Gain (Loss) on Disposition of Assets, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Loss (gain) on sale or disposal of assets, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Gain (Loss) on Disposition of Assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Loss (gain) on sale or disposal of assets, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Current Fiscal Year End Date </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Current Fiscal Year End Date </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostExcludingServiceComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Pension and postretirement non-service benefit (income) loss </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostExcludingServiceComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Pension Costand Other Postretirement Benefits Cost Reversalof Cost Excluding Service Component </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostExcludingServiceComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Pension Cost and Other Postretirement Benefits Cost (Reversal of Cost), Excluding Service Component </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Other Assets, Noncurrent, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other non-current assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Assets, Noncurrent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, Address Line One </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address, Address Line One </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanBenefitReceivingPaymentsByPlanParticipant_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Participants and beneficiaries who are currently receiving payments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanBenefitReceivingPaymentsByPlanParticipant_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plan Benefit Receiving Payments By Plan Participant </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanBenefitReceivingPaymentsByPlanParticipant_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Defined Benefit Plan Benefit Receiving Payments By Plan Participant </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disposal Groups, Including Discontinued Operations [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Recent Accounting Pronouncements </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Standards Update and Change in Accounting Principle [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidCapitalized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Interest expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidCapitalized_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Interest expense, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidCapitalized_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Interest Paid, Capitalized, Investing Activities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Income Tax Expense (Benefit), Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Provision (benefit) for income taxes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Income Tax Expense (Benefit) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_CashProceedsFromIssuanceOfRemainingInternalRevenueService_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Cash proceeds from issuance of remaining internal revenue service. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_CashProceedsFromIssuanceOfRemainingInternalRevenueService_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Cash proceeds from issuance of remaining internal revenue service </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_CashProceedsFromIssuanceOfRemainingInternalRevenueService_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash proceeds from issuance of remaining internal revenue service </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Income Tax Provision </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Income Tax Disclosure [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Preferred Stock, Shares Issued, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Preferred shares, issued (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Preferred Stock, Shares Issued </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other current liabilities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Accrued Liabilities, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_EmployeeRetentionCreditRefundableTaxCreditForEligibleEmployer_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Employee retention credit refundable tax credit for eligible employers </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_EmployeeRetentionCreditRefundableTaxCreditForEligibleEmployer_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Retention Credit Refundable Tax Credit For Eligible Employer </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_EmployeeRetentionCreditRefundableTaxCreditForEligibleEmployer_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Employee retention credit refundable tax credit for eligible employer. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Income Tax Disclosure [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Change in accounting principle, accounting standards update, adoption date </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Change in Accounting Principle, Accounting Standards Update, Adoption Date </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DaidoSteelShanghaiCoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Daido Steel (Shanghai) Co., Ltd. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DaidoSteelShanghaiCoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Daido Steel Shanghai Co Limited [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DaidoSteelShanghaiCoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Daido Steel (Shanghai) Co., Limited. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ForeignTaxPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Foreign tax payments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ForeignTaxPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Foreign Tax Payments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ForeignTaxPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Foreign Tax Payments. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SalesAndUseTaxRefund_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Sales and use taxes refund </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SalesAndUseTaxRefund_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Sales and use tax refund </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SalesAndUseTaxRefund_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Sales And Use Tax Refund </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SalesAndUseTaxRefund_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Sales and use tax refund. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Amortization of prior service cost </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plan, Amortization of Prior Service Cost (Credit) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForCapitalImprovements_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Capital expenditures </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForCapitalImprovements_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Payments for Capital Improvements </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PercentageOfEmployeeWagesDeferredAsEmployerShareOfPayrollTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Percentage of employee wages deferred as employer share of payroll taxes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PercentageOfEmployeeWagesDeferredAsEmployerShareOfPayrollTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Percentage Of Employee Wages Deferred As Employer Share Of Payroll Taxes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PercentageOfEmployeeWagesDeferredAsEmployerShareOfPayrollTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Percentage of employee wages deferred as employer share of payroll taxes. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Additional Paid in Capital, Common Stock, Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Additional Paid in Capital, Common Stock, Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Additional paid-in capital </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Additional Paid in Capital, Common Stock </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementScenarioAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Scenario </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementScenarioAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Scenario [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkensteelCorporationRetirementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> TimkenSteel corporation retirement plan. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkensteelCorporationRetirementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> TimkenSteel Corporation Retirement Plan [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkensteelCorporationRetirementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Salaried Plan </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPensionPlanObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase (Decrease) in Obligation, Pension Benefits </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPensionPlanObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Increased in pension liability </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Filer Category </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Filer Category </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeveranceCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restructuring charges related to severance and employee-related benefits </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeveranceCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Severance Costs </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Non-Current Liabilities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities, Noncurrent [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MoneyMarketFundsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Money market investment carrying value </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MoneyMarketFundsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Money Market Funds, at Carrying Value </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateEarlyAdoption_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Change in accounting principle, accounting standards update, early adoption </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateEarlyAdoption_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Other comprehensive income (loss) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Other comprehensive income (loss), net of tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Current Reporting Status </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Current Reporting Status </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total inventories, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Inventories, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Inventory, Net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> State and local tax payments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Current State and Local Tax Expense (Benefit) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ThirdAmendedCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Third Amended Credit Facility </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ThirdAmendedCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Third Amended Credit Facility [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ThirdAmendedCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Third Amended Credit Facility [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AOCIAttributableToParentNetOfTaxRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> AOCI Attributable to Parent, Net of Tax [Roll Forward] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AOCIAttributableToParentNetOfTaxRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> AOCI Attributable to Parent, Net of Tax [Roll Forward] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Asset Impairment Charges, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Impairment charges </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Asset Impairment Charges </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Inventories </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Inventory Disclosure [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SpecialBarQualityBarsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Bar </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SpecialBarQualityBarsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Special Bar Quality Bars [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SpecialBarQualityBarsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Special Bar Quality Bars [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Restricted Cash and Cash Equivalents [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Ending balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stockholders' Equity Attributable to Parent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total Shareholders' Equity </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated Other Comprehensive Income (Loss) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> AOCI Attributable to Parent [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SparePartsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Spare Parts </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SparePartsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Spare Parts [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SparePartsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Spare parts. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Tax Identification Number </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Tax Identification Number </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common shares, without par value; authorized 200.0 million shares; issued 2022 - 47.1 million shares and 2021 - 46.3 million shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Common Stock, Value, Issued, Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Common Stock, Value, Issued, Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Common Stock, Value, Issued, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock, Value, Issued </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Retained Earnings (Accumulated Deficit), Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Retained Earnings (Accumulated Deficit), Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Retained Earnings (Accumulated Deficit), Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Retained deficit </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Retained deficit </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Retained Earnings (Accumulated Deficit) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CumulativeEffectPeriodOfAdoptionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cumulative Effect, Period of Adoption </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CumulativeEffectPeriodOfAdoptionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Cumulative Effect, Period of Adoption [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryValuationReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Inventory Valuation Reserves, Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryValuationReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Inventory Valuation Reserves, Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryValuationReserves_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Allowance for inventory reserves </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryValuationReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Inventory Valuation Reserves </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Equity Components </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Equity Components [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Consolidated Entities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Consolidated Entities [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounting Standards Update </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Standards Update [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Issuance Costs, Gross </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Transaction costs, debt gross </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Disaggregation Of Revenue [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disaggregation of Revenue [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Convertible Notes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleDebtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Debt [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Emerging Growth Company </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Emerging Growth Company </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Payment for Pension and Other Postretirement Benefits, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitContributions_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Pension and postretirement contributions and payments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Payment for Pension and Other Postretirement Benefits </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanInterestCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Interest cost </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanInterestCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plan, Interest Cost </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Final cash payment of interest made to noteholders </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Interest Expense, Debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessExitCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restructuring charges related to transition of customers to other manufacturing equipment </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessExitCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Business Exit Costs </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Retirement Plan Type </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Retirement Plan Type [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkensteelUKPensionSchemeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> TimkenSteel U.K. pension scheme. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkensteelUKPensionSchemeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> TimkenSteel U.K. Pension Scheme [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkensteelUKPensionSchemeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Pension Scheme </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfConvertibleDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Repayments on convertible notes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfConvertibleDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Settled with cash payment </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfConvertibleDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Repayments of Convertible Debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanServiceCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Service cost </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanServiceCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plan, Service Cost </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Gain (loss) on sale/disposal </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MeltAndCastRelatedAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Melt and Cast Related Assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MeltAndCastRelatedAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Melt And Cast Related Assets [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MeltAndCastRelatedAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Melt and cast related assets. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Transition Report </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Document Transition Report </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair value of shares granted </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Depreciation, Depletion and Amortization, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Depreciation and amortization </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Depreciation, Depletion and Amortization </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Non-cash charges related to write down of assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Impairment, Long-Lived Asset, Held-for-Use </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Impairment, Long-Lived Asset, Held-for-Use, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IndustrialMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Industrial </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IndustrialMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Industrial Market Sector [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IndustrialMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Industrial Market Sector [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Accumulated Other Comprehensive Income (Loss) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Contingencies </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Commitments and Contingencies Disclosure [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Accumulated Other Comprehensive Income (Loss), Net of Tax, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated other comprehensive income (loss) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accumulated Other Comprehensive Income (Loss), Net of Tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Deferred income taxes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase (Decrease) in Deferred Income Taxes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounts receivable, net of allowances (2022 - $2.4 million; 2021 - $1.9 million) Inventories, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Accounts Receivable, after Allowance for Credit Loss, Current, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accounts Receivable, after Allowance for Credit Loss, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Common Stock, Shares Outstanding </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Common Stock, Shares Outstanding </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Incremental Common Shares Attributable To Share Based Payment Arrangements Shares Assumed Issued </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Incremental common Shares attributable to share based payment arrangements shares assumed Issued. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_NumberOfProvisionsWithinActThatImpactsCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of provisions within act that impacts company </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_NumberOfProvisionsWithinActThatImpactsCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Number Of Provisions Within Act That Impacts Company </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_NumberOfProvisionsWithinActThatImpactsCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Number of provisions within act that impacts company. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Amortization of debt issuance costs </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Amortization of Debt Issuance Costs </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DeferredCashPaymentsOfPayrollTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Deferred cash payments of payroll taxes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DeferredCashPaymentsOfPayrollTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Deferred Cash Payments Of Payroll Taxes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DeferredCashPaymentsOfPayrollTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Deferred cash payments of payroll taxes. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revision of Prior Period </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Revision of Prior Period [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net Income (Loss) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net income (loss) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Net Income (Loss) Attributable to Parent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt instrument, threshold trading days </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument, Convertible, Threshold Trading Days </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Current operating lease liabilities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Lease, Liability, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Loss (gain) from remeasurement of benefit plans </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Pension Cost and Other Postretirement Benefits Cost (Reversal of Cost), Remeasurement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Pension Cost and Other Postretirement Benefits Cost Reversal of Cost Remeasurement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Total gain from remeasurement of benefit plans </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PensionCostandOtherPostretirementBenefitsCostReversalofCostRemeasurement_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Total gain from remeasurement of benefit plans </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Additional Paid-in Capital </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Additional Paid-in Capital [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Shares surrendered for employee taxes on stock compensation </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Payment, Tax Withholding, Share-Based Payment Arrangement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserveRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restructuring Reserve [Roll Forward] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserveRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring Reserve [Roll Forward] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Registrant Name </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Registrant Name </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Foreign currency translation adjustments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Cash and Cash Equivalents, at Carrying Value, Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Cash and Cash Equivalents, at Carrying Value, Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Cash and Cash Equivalents, at Carrying Value, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash and cash equivalents </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Cash and Cash Equivalents, at Carrying Value </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Repurchase Program, Number of Shares Authorized to be Repurchased </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Shares repurchased </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Earnings (Loss) Per Share </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Earnings Per Share [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Share-based Payment Arrangement, Noncash Expense, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock-based compensation expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Share-Based Payment Arrangement, Noncash Expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Statement of Comprehensive Income [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Property, Plant and Equipment, Net, Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Property, Plant and Equipment, Net, Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Property, Plant and Equipment, Net, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Property, plant and equipment, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Property, Plant and Equipment, Net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Award Type </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Award Type [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statement [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Statement [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Standards Update and Change in Accounting Principle [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Title of 12(b) Security </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Title of 12(b) Security </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Increase (Decrease) in Accounts Payable, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounts payable </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase (Decrease) in Accounts Payable </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common Shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Operating Activities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided by (Used in) Operating Activities [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Equity Component </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Equity Component [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Revenue from Contract with Customer, Excluding Assessed Tax, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net sales </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Revenue from Contract with Customer, Excluding Assessed Tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Income (Loss) Before Income Taxes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, State or Province </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address, State or Province </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanTermOfContract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Defined benefit plan term of contract. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanTermOfContract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plan Term Of Contract </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanTermOfContract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Defined benefit plan term of contract </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Document Type </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Document Type </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of treasury shares (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period, Shares, Treasury Stock Reissued </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> UNITED STATES </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> United States of America </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Shell Company </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Shell Company </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ProceedsFromIssuanceOfInternalRevenueService_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Proceeds from issuance of internal revenue service. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ProceedsFromIssuanceOfInternalRevenueService_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds from Issuance of Internal Revenue Service </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ProceedsFromIssuanceOfInternalRevenueService_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from issuance of internal revenue service </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Increase (Decrease) in Inventories, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Inventories, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase (Decrease) in Inventories </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock-based compensation expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Share-Based Payment Arrangement, Expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_NumberOfInstallmentsDeferredCashPaymentsOfPayrollTaxesToBePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of equal installments in deferred payroll taxes to be paid </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_NumberOfInstallmentsDeferredCashPaymentsOfPayrollTaxesToBePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Number Of Installments Deferred Cash Payments Of Payroll Taxes To Be Paid </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_NumberOfInstallmentsDeferredCashPaymentsOfPayrollTaxesToBePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Number of installments, deferred cash payments of payroll taxes to be paid. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherInventorySupplies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Manufacturing supplies </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherInventorySupplies_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Inventory, Supplies, Gross </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_EnergyMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Energy </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_EnergyMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Energy Market Sector [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_EnergyMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Energy Market Sector [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TreasuryStockShareAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Treasury stock, share, acquired. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TreasuryStockShareAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Treasury Stock, Share, Acquired </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TreasuryStockShareAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Purchase of treasury shares (in Shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Security Exchange Name </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Security Exchange Name </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Revenue from Contract with Customer [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net Cash Provided (Used) by Operating Activities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided by (Used in) Operating Activities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_OtherComprehensiveIncomeLossDeferralsBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Amounts deferred to accumulated other comprehensive income (loss),before income tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_OtherComprehensiveIncomeLossDeferralsBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Comprehensive Income Loss Deferrals Before Tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_OtherComprehensiveIncomeLossDeferralsBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Other comprehensive income loss deferrals before tax. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Tax effect </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other comprehensive income (loss), net of tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Tax effect </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restricted Stock Units </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Restricted Stock Units (RSUs) [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Adoption of New Accounting Standards </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> New Accounting Pronouncements, Policy [Policy Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Defined Benefit Plans Disclosures [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Common Stock, Shares, Outstanding, Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Common Stock, Shares, Outstanding, Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock, Shares, Outstanding </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common Stock, Shares outstanding </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Gain (Loss) on Extinguishment of Debt, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Gain (Loss) on Extinguishment of Debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Loss on extinguishment of debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Loss on extinguishment of debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryWorkInProcess_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Work in process </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryWorkInProcess_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Inventory, Work in Process, Gross </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Financing Arrangements </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Disclosure [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Investing Activities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided by (Used in) Investing Activities [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Restricted Cash and Cash Equivalents, Current, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Restricted Cash and Cash Equivalents, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restricted cash reported in other current assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Interest Paid, Including Capitalized Interest, Operating and Investing Activities, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Interest paid </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Interest Paid, Including Capitalized Interest, Operating and Investing Activities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Common Stock, Shares, Issued, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common shares, issued (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock, Shares, Issued </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Minimum [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Minimum [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_QualifiedWagesPerEmployee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Qualified wages per employee </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_QualifiedWagesPerEmployee_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Qualified Wages Per Employee </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_QualifiedWagesPerEmployee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Qualified wages per employee. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Increase (Decrease) in Stockholders' Equity [Roll Forward] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase (Decrease) in Stockholders' Equity [Roll Forward] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounting Standards Update </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Standards Update [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt Instrument </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Shareholders’ Equity </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stockholders' Equity Attributable to Parent [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Treasury Shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Treasury Stock [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Foreign Currency Transaction Gain (Loss), before Tax, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Foreign currency exchange loss (gain) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Foreign Currency Transaction Gain (Loss), before Tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Counterparty Name </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Counterparty Name [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_OtherMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_OtherMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Market Sector [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_OtherMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Other Market Sector [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Award Type </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Award Type [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Subsequent Event </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Subsequent Event [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Retirement Plan Name [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Basis of Presentation </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Basis of Presentation and Significant Accounting Policies [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Other Nonoperating Income (Expense), Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel"> Total other (income) expense, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Other (income) expense, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Nonoperating Income (Expense) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Interest Expense [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Long-term Debt, Current Maturities, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Less current portion of debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Long-Term Debt, Current Maturities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Discontinued Operations and Disposal Groups [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatutoryAccountingPracticesByJurisdictionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Jurisdiction </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatutoryAccountingPracticesByJurisdictionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Jurisdiction [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_USFederalPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> U.S federal payments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_USFederalPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> U.S Federal Payments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_USFederalPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> U.S Federal Payments. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Central Index Key </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Central Index Key </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherIncomeAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Income and Expenses [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Payments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Payments for Restructuring </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestOnConvertibleDebtNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Add convertible notes interest </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestOnConvertibleDebtNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Interest on Convertible Debt, Net of Tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MajorCustomersAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Customer </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MajorCustomersAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Customer [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Policies [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Disaggregation of Revenue [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disaggregation of Revenue [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ManufacturedComponentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Manufactured Components </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ManufacturedComponentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Manufactured Components [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ManufacturedComponentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Manufactured components. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Numerator: </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDilutedAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebtExcludingAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Contractual interest expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebtExcludingAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Interest Expense, Debt, Excluding Amortization </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock-Based Compensation </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Share-Based Payment Arrangement [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_InvestmentLossesOnPlanAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Investment Losses On Plan Assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_InvestmentLossesOnPlanAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Investment Losses On Plan Assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_InvestmentLossesOnPlanAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Investment losses on plan assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Amortization of Debt Issuance Costs and Discounts, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Amortization of Debt Issuance Costs and Discounts </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Amortization of deferred financing fees </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Organization, Consolidation and Presentation of Financial Statements [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanContractExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Defined benefit plan contract expiration date. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanContractExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plan Contract Expiration Date </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_DefinedBenefitPlanContractExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Defined benefit plan contract expiration date </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Debt Issuance Costs, Net, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Less: Debt issuance costs, net of amortization </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Transaction costs, debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Issuance Costs, Net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioForecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Forecast </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioForecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Forecast [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities: </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Retained Deficit </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Retained Earnings [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligationPaymentForSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Bargaining Plan's obligations </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligationPaymentForSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plan, Benefit Obligation, Payment for Settlement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SalariesWagesAndBenefitsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Salaries, wages and benefits </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SalariesWagesAndBenefitsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Salaries Wages And Benefits Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SalariesWagesAndBenefitsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Salaries wages and benefits current. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from sale of consolidated subsidiary, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds from Divestiture of Interest in Consolidated Subsidiaries </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Customer </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Customer [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Effective Income Tax Rate Reconciliation, Percent, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Effective tax rate </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Effective Income Tax Rate Reconciliation, Percent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Amounts reclassified from accumulated other comprehensive income (loss), before income tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Reclassification from AOCI, Current Period, before Tax, Attributable to Parent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Interactive Data Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Interactive Data Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt Instrument, , threshold consecutive trading days </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument, Convertible, Threshold Consecutive Trading Days </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MobileMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Mobile </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MobileMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Mobile Market Sector [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MobileMarketSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Mobile Market Sector [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SeamlessMechanicalTubingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Tube </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SeamlessMechanicalTubingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Seamless Mechanical Tubing [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_SeamlessMechanicalTubingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Seamless Mechanical Tubing [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Local Phone Number </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Local Phone Number </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Federal statutory income tax rate </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Earnings Per Share, Basic and Diluted </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Disclosure [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share Based Compensation Arrangement By Share Based Payment Award [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeAndExpenseTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other (Income) Expense, Net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeAndExpenseTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Nonoperating Income and Expense [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Consolidated Entities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Consolidated Entities [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Disaggregation of Revenue </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disaggregation of Revenue [Table Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock options, shares granted </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Other Liabilities, Noncurrent, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other non-current liabilities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Other Liabilities, Noncurrent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of positions eliminated </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring and Related Cost, Number of Positions Eliminated </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Shares surrendered for taxes </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Treasury Stock, Value, Acquired, Cost Method </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Purchase of treasury shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Long-Term Debt </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Ending balance (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Shares, Outstanding </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Liability, Defined Benefit Plan, Noncurrent, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accrued pension and postretirement costs </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Liability, Defined Benefit Plan, Noncurrent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Inventory Disclosure [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentChargeOnReclassifiedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Impairment charges </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentChargeOnReclassifiedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Impairment Charge on Reclassified Assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Share Price </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Average repurchase price </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncreaseDecreaseInCurrentConvertibleNotesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Increase to current convertible notes net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncreaseDecreaseInCurrentConvertibleNotesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Current Convertible Notes Net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncreaseDecreaseInCurrentConvertibleNotesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Increase (decrease) in current convertible notes, net. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt Instrument, Name </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument, Name [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Fiscal Year Focus </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Document Fiscal Year Focus </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Intangible Assets, Net (Excluding Goodwill), Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Intangible assets, net </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Intangible Assets, Net (Excluding Goodwill) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Earnings Per Share, Basic, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Basic earnings (loss) per share </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Earnings Per Share, Basic </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Basic earnings (loss) per share </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_GainLossOnSaleOfConsolidatedSubsidiary_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Loss on sale of consolidated subsidiary </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_GainLossOnSaleOfConsolidatedSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Gain Loss On Sale Of Consolidated Subsidiary </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_GainLossOnSaleOfConsolidatedSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Gain loss on sale of consolidated subsidiary. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> ASSETS </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Assets [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Increase (Decrease) in Accrued Liabilities, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other accrued expenses </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase (Decrease) in Accrued Liabilities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Gross Profit </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Gross Profit </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Deferred charges and prepaid expenses </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Prepaid Expense and Other Assets, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Treasury shares - 2022 - 0.7 million; 2021 - None </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Treasury Stock, Value, Ending Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Treasury Stock, Value, Beginning Balance </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Treasury Stock, Value, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Treasury Stock, Value </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument, Face Amount </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt Instrument, Face Amount </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockCompensationPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Equity-based Awards [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockCompensationPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Share-Based Payment Arrangement [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_AmericanRescuePlanActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> American Rescue Plan Act </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_AmericanRescuePlanActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> American Rescue Plan Act [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_AmericanRescuePlanActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> American rescue plan act. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Long-Lived Tangible Asset </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Long-Lived Tangible Asset [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> LIABILITIES AND SHAREHOLDERS’ EQUITY </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities and Equity [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accrued benefit </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accrued Employee Benefits, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Gross inventory </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Inventory, Gross </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Antidilutive Securities, Name </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Antidilutive Securities, Name [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Current Assets </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Assets, Current [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkensteelCorporationBargainingUnitPensionPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> TimkenSteel corporation bargaining unit pension plan. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkensteelCorporationBargainingUnitPensionPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> TimkenSteel Corporation Bargaining Unit Pension Plan [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_TimkensteelCorporationBargainingUnitPensionPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Bargaining Plan </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableTradeCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounts payable </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableTradeCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accounts Payable, Trade, Current </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ActProvisionsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Provisions description </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ActProvisionsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Act Provisions Description </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ActProvisionsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Act provisions description. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_MX_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> MEXICO </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_MX_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Mexico </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_StockIssuedDuringPeriodSharesStockBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock-based compensation expense (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_StockIssuedDuringPeriodSharesStockBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Shares Stock Based Compensation </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_StockIssuedDuringPeriodSharesStockBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Stock issued during period, shares, stock-based compensation. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Changes in operating assets and liabilities: </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase (Decrease) in Operating Capital [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MiscellaneousNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Miscellaneous (income) expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MiscellaneousNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Miscellaneous Nonoperating Income Expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_MiscellaneousNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Miscellaneous Nonoperating Income (Expense) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restructuring Charges </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Restructuring and Related Activities Disclosure [Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Cover [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanSponsorLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Retirement Plan Sponsor Location [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Product and Service </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Product and Service [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Inventory, Finished Goods, Gross, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Finished products </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Inventory, Finished Goods, Gross </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermLineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Credit Agreement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermLineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Long-Term Line of Credit, Noncurrent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Foreign Plan [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Current Liabilities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities, Current [Abstract] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Shares assumed purchased </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Incremental Common Shares Attributable To Share Based Payment Arrangements Shares Assumed Purchased </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsSharesAssumedPurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Incremental common shares attributable to share based payment arrangements shares assumed purchased. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Disposal Group Name </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Disposal Group Name [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Maximum </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Maximum [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Defined Benefit Plans Disclosures </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Defined Benefit Plans Disclosures [Table Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PercentageOfTaxCredits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Percentage of tax credit </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PercentageOfTaxCredits_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Percentage Of Tax Credits </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_PercentageOfTaxCredits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Percentage of tax credits. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Retirement Plan Name [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of treasury shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period, Value, Treasury Stock Reissued </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net Cash Provided (Used) by Investing Activities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided by (Used in) Investing Activities </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock option activity (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Components of Inventory </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule of Inventory, Current [Table Text Block] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Pension and Postretirement Liability Adjustments </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock option activity </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period, Value, Stock Options Exercised </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_AdditionalInventoryReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Additional inventory reserve </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_AdditionalInventoryReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Additional Inventory Reserve </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_AdditionalInventoryReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Additional inventory reserve. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Repurchase Program, Remaining Authorized Repurchase Amount </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock Repurchase Program, Remaining Amount </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Principal amount </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Principal </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Long-Term Debt, Gross </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common shares, authorized (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock, Shares Authorized </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Settlement gain </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Net remeasurement losses (gains) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Trading Symbol </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Trading Symbol </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ConvertibleSeniorNotesdueTwentyTwentyOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Convertible Senior Notes due 2021 </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ConvertibleSeniorNotesdueTwentyTwentyOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Convertible Senior Notes due 2021 </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ConvertibleSeniorNotesdueTwentyTwentyOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Senior Notesdue Twenty Twenty One [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_ConvertibleSeniorNotesdueTwentyTwentyOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Convertible Senior Notes due Twenty Twenty One [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net income (loss), diluted </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Net Income (Loss) Available to Common Stockholders, Diluted </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Selling, General and Administrative Expense, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Selling, general and administrative expenses </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Selling, General and Administrative Expense </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Subsequent Event Type [Axis] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PerformanceSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Performance Shares </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PerformanceSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Performance Shares [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Comprehensive Income (Loss), net of tax </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Comprehensive Income (Loss), Net of Tax, Attributable to Parent </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from disposals of property, plant and equipment </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds from Sale of Property, Plant, and Equipment </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Proceeds from Sale of Property, Plant, and Equipment, Total </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DomesticPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Domestic Plan [Member] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated Other Comprehensive Income Loss [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Accumulated Other Comprehensive Income (Loss) [Line Items] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockSharesAcquired_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Shares surrendered for taxes (in shares) </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockSharesAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Treasury Stock, Shares, Acquired </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Long-Lived Tangible Asset </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Long-Lived Tangible Asset [Domain] </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncreaseDecreaseToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel"> Reduction of additional paid-in capital </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncreaseDecreaseToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Decrease to additional paid in capital </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncreaseDecreaseToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease To Additional Paid In Capital </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tmst_IncreaseDecreaseToAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation"> Increase (decrease) to additional paid-in capital. </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount1_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Repurchase Program, Authorized Amount </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock Repurchase Program, Amount </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Shares granted </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_GB_lbl" xlink:role="http://www.xbrl.org/2003/role/label"> UNITED KINGDOM </link:label> |
| | <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_GB_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> United Kingdom </link:label> |
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